Mark the problem is with the design of the cossie engine, the resonance that the YB exhibits and the space in which we have to package the manifold. The downward angle of the exhaust ports makes expansion issues a serious issue on the YB, and makes slip joints a necessity.

I hope Rod's manifold lasts, truely I do but I know with all the heart ache and effort I've put into mine you're fighting a losing battle.